@misc{Cayley_Arthur_(1821–1895)_Notes_1889,
 author={Cayley Arthur (1821–1895)},
 copyright={Public Domain},
 address={Cambridge},
 journal={Mathematical papers},
 howpublished={online},
 year={1889},
 publisher={Cambridge University Press},
 language={eng},
 title={Notes on Lagrange's Theorem},
 type={Text},
 URL={http://rcin.org.pl./Content/122037/PDF/WA35_148268_12807-2_Art1.pdf},
}